Q2. Match List I with List II
List - I
A. Mg in solid state
B. MgCl2 in molten state
C. Silicon with

Q: What is the correct answer for CUET UG Chemistry Q2?

The correct answer is d. Option (A) Mg is a metal that has free electrons. So, it conducts electricity in the solid state and is known as an electronic conductor. Hence, (A) → (iv)Option (B) MgCl2 shows electrolytic conductivity in the molten state due to its behaviour as an electrolyte (i.e., mobile ions Mg2+ and Cl- ions help in the flow of current). Thus, MgCl2 is an electrolytic conductor. Hence, (B) → (iii)Option (C)

Q: Q2. Match List I with List II List - I A. Mg in solid state B. MgCl2 in molten state C. Silicon with phosphorus D. Germanium with boron List - II I. p-type Semiconductor II. n-type Semiconductor III.…

The correct answer is d. Option (A) Mg is a metal that has free electrons. So, it conducts electricity in the solid state and is known as an electronic conductor. Hence, (A) → (iv)Option (B) MgCl2 shows electrolytic conductivity in the molten state due to its behaviour as an electrolyte (i.e., mobile ions Mg2+ and Cl- ions help in the flow of current). Thus, MgCl2 is an electrolytic conductor. Hence, (B) → (iii)Option (C)

Q: What are the options for this CUET UG Chemistry question?

A. A-I, B-II, C-III, D-IV · B. A-II, B-III, C-IV, D-I · C. A-III, B-II, C-I, D-IV · D. A-IV, B-III, C-II, D-I

Question

Q2. Match List I with List II
List - I
A. Mg in solid state
B. MgCl2 in molten state
C. Silicon with phosphorus
D. Germanium with boron
List - II
I. p-type Semiconductor
II. n-type Semiconductor
III. Electrolytic Conductor
IV. Electronic Conductor
(a) A-I, B-II, C-III, D-IV
(b) A-II, B-III, C-IV, D-I
(c) A-III, B-II, C-I, D-IV
(d) A-IV, B-III, C-II, D-I

FirstInTest · Accepted Answer

Option (A) Mg is a metal that has free electrons. So, it conducts electricity in the solid state and is known as an electronic conductor. Hence, (A) → (iv)Option (B) MgCl2 shows electrolytic conductivity in the molten state due to its behaviour as an electrolyte (i.e., mobile ions Mg2+ and Cl- ions help in the flow of current). Thus, MgCl2 is an electrolytic conductor. Hence, (B) → (iii)Option (C) When silicon (group 14) is doped with phosphorus (group 15), which contains five valence electrons, four out of the five valence electrons form covalent bonds with the four neighbouring silicon atoms. The fifth electron is extra and is delocalized. These delocalized electrons increase the conductivity due to the negatively charged electrons. Hence silicon doped with phosphorus (electron-rich impurity) is called an n-type semiconductor. Hence, (C) → (ii)Option (D) When germanium (group 14) is doped with boron (group 13), which contains three valence electrons, the three valence electrons form covalent bonds with the four neighbouring silicon atoms. The place where the fourth valence electron is missing is called the electron-hole or electron vacancy. An electron from the nearby atom can occupy the vacancy, but in doing so, it would leave a vacancy in its original position. Thus, it would seem as if the electron-hole is moving in the direction opposite to the electron that first occupied the vacant site. Under the influence of an electric field, the electrons move towards the positively charged plate whilst the electron-hole moves towards the negatively charged plate, as if the electron-hole were positive. Hence germanium doped with boron (electron-deficient impurity) is called a p-type semiconductor. Hence, (D) → (i)

Answer

A-I, B-II, C-III, D-IV

Answer

A-II, B-III, C-IV, D-I

Answer

A-III, B-II, C-I, D-IV

Answer

A-IV, B-III, C-II, D-I

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